Research on the added value of CT values mean the critical value of sensitivity analysis in the clinical diagnosis of giant cell tumor of bone / 中国医学装备

ABSTRACT

Objective:To investigate the CT value added value of the mean of critical value in the diagnosis of giant cell tumor clinical sensitivity.Methods: Aretrospective analysis, selected from March 2013 to November 2014, the clinical data of 120 patients with bone tumors treated, they can be divided into two groups at random, control group and the observer, 60 cases in each group, observer for patients with giant cell tumor of bone, the control for the patients with giant cell tumor of bone. Each patient chose three ROI, the added value of the mean values of enhanced CT and CT values mean as observed values, under the experience of observation analysis of patients with giant cell tumor of the added value of CT values mean critical value and its sensitivity in the clinical diagnosis of giant cell tumor of bone.Results: The observation group of patients after CT enhanced scan display area average CT value of HU(108±39)HU was significantly higher than the control group(82±78)HU CT value(t=3.348, P<0.05), statistically significant difference; Through the ROC curve analysis, found that when the added value of CT values mean acuity 96.5 as critical, sensitivity and specificity of diagnosis of giant cell tumors of bone are 90.9% and 90.9% respectively; When the CT value added value of the mean acuity 41.5 HU as the critical point, the sensitivity and specificity of diagnosis of giant cell tumor bone were 98.9%, 48.1% respectively.Conclusion: The bone giant cell average CT value added value of diagnosis of critical value of 96.5HU 41.5HU, and high sensitivity, but the specificity is low, the added value of CT values help determine the existence of the giant cell tumors of bone.